;
; ROM patches file
;
; This file describes how to patch a ROM for things like turbotape,
; and filename decoding.
;

; ****** ROM INFORMATION ******

; This part isn't actual patches, just information about
; the hardware the ROM expects to be present.

; ROM expects a special keyboard layout?
keymap = qwerty

; ****** FILENAME DECODING *******

; When the PC is about to execute this address, we should be at a point
; in CLOAD/CSAVE/STORE/RECALL where the filename is valid in memory.
fd_cload_getname_pc = $e4ac
fd_csave_getname_pc = $e92c
fd_store_getname_pc = $e98b
fd_recall_getname_pc = $e9d8

; The address to read the CLOAD filename
fd_getname_addr = $027f


; ****** TURBOTAPE ******

; Address of the "Cassette Sync" function in ROM
tt_getsync_pc = $e735

; Address of the RTS at the end of the cassette sync function (so we can
; skip the function)
tt_getsync_end_pc = $e759

; If turbotape is enabled, but no tape is inserted, the cassette sync
; function will be executed normally. Here we have an address inside the
; loop that waits for the cassette sync signal, so that we can break out
; of it if a tape is inserted.
tt_getsync_loop_pc = $e720

; Address of the "Read Byte" function in ROM
tt_readbyte_pc = $e6c9

; Address of the RTS at the end of the read byte function
tt_readbyte_end_pc = $e6fb

; Set carry at end of readbyte routine?
tt_readbyte_setcarry = yes

; In order to simulate the effects of the read byte routine, you can
; specify an address to write the byte read, and an address to write
; zero to.
tt_readbyte_storebyte_addr = $002f
tt_readbyte_storezero_addr = $02b1

; Address of the "put byte" function in ROM
tt_putbyte_pc = $e65e

; Address of the RTS at the end of the put byte function
tt_putbyte_end_pc = $e68a

; Address of the RTS at the end of CSAVE
tt_csave_end_pc = $e93c

; Address of the RTS at the end of STORE
tt_store_end_pc = $e9d0

; Address of the function that writes the tape leader
; (so we can write a shorter one)
tt_writeleader_pc = $e75a
tt_writeleader_end_pc = $e769

; Patch default Pravetz keyboard layout
$3F78:37EAEDEB20F5F938EEF436392CE9E8EC
$3F88:35F2E23B2EEFE730F6E6342D0BF0E52F
$3F98:0000000000000000311BFA00087FE10D
$3FA8:F8F1325C0A5DF37C33E4E327095BF73D
$3FB8:264A4D4B2055592A4E545E283C49484C
$3FC8:2552423A3E4F47295646245F0B50453F
$3FD8:0000000000000000211B5A00087F410D
$3FE8:585140600A7D537E23444322097B572B